Device for cooling water



1933- B. H. COFFEY DEVICE FOR COOLING WATER Original Filed Dec. 1925Reissued Dec. 5, 1933 I 19,014 DEVICE son COOLING WATER v Barton H.Cofiey, Elizabeth, The Cooling Tower 00.

J., assignor to Inn, New York, N. Y.,

a corporation of New York Original No. 1,762,762, dated June 10, 1930,Serial No. 73,458, December 5, 1925.. Application for reissue October24, 1930. Serial No.'491,063

5 Claims. (01. 2s1 117) j My invention has relation to new and usefimprovements in devices for cooling water and the like and the primaryobject of my invention. is to provide an effective and economical devicefor cooling water and the like; another object of my invention is toprovide a device of the character described of a minimum weight; anotherobject of my invention is to minimize the energy necessary to maintainthe air current in the de vice.

I accomplish this object by the device illustrated in the accompanyingdrawing.

The invention consists in the improvements fully described hereinafterand the novelty of which will be particularly pointed out and distinctlyclaimed.

I have fullyv and clearly illustrated my invention in the accompanyingdrawing to be taken as a part of this specification and wherein:

Figure 1 is a sectional elevation ofthe device with a schematic diagramof the cooling system,

Figure 2 is a cross section on the line 2-2 in Figure 1, and .7

Figure 3 is a detail of the eliminator screen, on the line 33 in Figure1.

Similar characters refer throughout the several views.

Before proceeding with the detail description of my invention, I wouldstate that it is shown as applied to a system in which there is acontinuous circulation of the water through the plant or surfacecondenser where it becomes heated and is then returned to the coolingdevice from which, after the desired reduction of temperature, it is tosimilar parts again delivered to the plant. By'the term diverging tubeas employed herein, is meanta diverging conduit having an angle ofdivergence that will cause it to transform velocity head to pressurehead in a stream of fluid passing from the smaller end to the large end.In diverging tubes there is a critical angle at which failure tofunction as a Venturi tube is abrupt. For wa-- ter discharging toatmospheric pressure, the critical angle is 7 at greater angles the jetjumps free and the discharge at the given head is governed by the smalldiameter, the flow necessarily decreasing.

Referring to the drawing by characters of reference, 1 is a frame workof any suitable character by which is supported the cooling draft tubein the form of an inverted truncated tube 2 having flaring sidespositioned at an angle of approximately six degrees to the vertical aswill be hereinafter more particularly explained, which forms a divergingtube possessing the qualities of the upstream or diverging. side of a.Venturi tube, and which is preferably provided with a mouth 3 havingvertical sides. In the mouth '3,

I provide an air nozzle 4 slightly smaller in cross section than themouth 3 of the tube whereby-an 6.0 1 annular passage 5: is-providedexteriorly of the, nozzle 4 and within the mouth 3. A duct 6 leads froma blower? to the air nozzle 4. At a suitable location such as the lowerpart of the frame 1 is provided meansfor collecting the wa,-. ter whichmay be a tank 8or they like but this tank 8 may be entirely omitted asconditionsmay require.

The cooled water is led by means of a duct 9. to a circulating pump 10from which it is car- 70. ried by a duct 11 or the like to the plant orsource of heat such as a surface condenser 12 or the like, where thewater becomes heated and is then car;- ried' by a suitable duct 13 toaspray nozzle14 which is preferably centrally located in the upper partof the tube 2. Above the tube 2 I'provide a stack 15 of such height asconditions may require and above the stack 15 I preferably provide a cap16 having a roof or cover 1'7 and open sides in which I preferably setvertical, angu- 8Q; larly disposed slats or eliminators 18, '18 soarranged that the air passing out of the tower will strike against thesaid slats 18.

The device being thus assembled, the water will be driven by the pump 10through the con- 86; denser 12 and ducts 11 and 13 to the spray nozzle14 which is of any desired type adapted to break up the water intospray.

The Water from the nozzle 14 will be met by the air delivered by theblower 7 through the 90;;

duct 6 to the air nozzle 4.

I preferably admit this air at a velocity of approximately 2000 feet perminute at' which velocity'no falling water is permitted to enter theopen air nozzle 4. The walls of the tube 2 preferably diverge at anincluded angle of approximately twelve to twenty four degrees whereby Ieffect a maximum economy of power and attain a high efliciency of thecirculating air which is well understood in the Venturi tube art. Thetube 2 serves as a diverging and diffusing discharge orifice whichgradually reduces the air velocity and correspondingly reduces thekinetic energy in the moving air mass and thus reduces the energynecessary to maintain the air current. The water from the nozzle 14 isdriven by the force of the-incoming air to the sides of the draft tube 2and runs down the sides thereof being cooled by this process and iscollected and carried off at the bottom by means 119 ot'the tube, meansfordelivering a spray of water 2, a a of the tank 8 or in any desiredmanner. The air in its upward passage through the draft tube 2 and thestack 15 will gradually lose its high velocity and its capacity forcarrying the water from the nozzle 14 and such water as may still becarried'by theair as it passes out of the top 16 of the device throughthe slats or eliminators 18 will be collected from'the air by the saidslats or eliminators 18 and will rim down the inner face of the stack 15and draft tube 2 to the collecting tank 8 so that the air which'passesout through the eliminators 18 will carry no spray.

I prefer to construct my said device of square or rectangular formwhereby each will form'a unit adapted to be set up in batteries of twoor more Having thus described inyinvention, what 1 claim is: r

1. In a device of the character described, the combination of adiverging tube provided with a mouth'having vertical sides, an airnozzle in the saidmouth, an annular passage exterior of the nozzle andwithin the mouth, means for deliver-v ing a spray orwater within theupper part of said tube, means for discharging air from the air nozzleata velocity sufllcient to prevent the water from entering the airnozzle whereby the water is caused to run down the sides of the tubebetween the mouth of the tube and the air duct,

means for collecting the water and means to con-. vey water from saidcollecting means to said delivering means.

2. In a device of the character described the combination of a divergingtube having amouth at'its lower'end, an air duct therein and adaptedtodeliver air at high velocity within the mouth to'be cooled withinthe-upper part of the tube; a stack above :the tube provided witheliminators adapted to 'collectwater from the air passing out of thestack, means for collecting said water, and means for redelivering saidwater to said first named means.

3. In a mechanical draft cooling tower, the

combination of a vertically disposed diverging tube, the walls of whichdiverge at an included degrees, a mouth having vertical walls at thesrnallerend of said tube, an air nozzle substantially filling saidmouth, means for discharging water to be cooledin the upper largeportion of -'angle "of approximately twelve to twenty-four the said tubein the form of finely divided spray,

and meansfor admitting air, through said nozzle, at a velocity ofapproximately 2000 feet per minute.

4. In a device of the character described, the combination of a verticaldiverging tube the walls of which diverge at an included angle ofapproximately twelve degrees to twenty-four degrees whereby velocityheadywill :be transformed to pressure head in a current of air passing.from the smaller end to the larger end of the tube, an air inlet-nozzlesubstantially fllling the smaller end of said tube, means for.delivering water in the form of spray in the larger portion of the tubeand meansfor admitting air at high velocity throughfsaid air inletnozzle vat the smaller portion of the said tube. T

5. In a device of the character described, the combination of a, tubepossessing the characteristics of a Venturi diverging tube, a'- mouth atthe smaller end of the tube and having vertical sides, an air inletnozzle substantially filling the said mouth and slightly spaced from itssides, a spray nozzle in'the upper part of the said tube,

and means for discharging air, tothe tube at.

high velocity through said air nozzle.

BARTON ;H. COFFEY;

